Combined type-writing and computing machine.



I a. F. mm. COMBiNED TYPE WRITING AND COMPUIFN'G MACHINE.

APPUCATIOH FILEQ NOV2| 15H4. Patented Oct. 1, 1918.

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coMaINE-n -TYPE wIIIIIIIG A'I'I'IcoMPuIIIIG MACHINE.

APPLICATION FILED NOV.2. 19H. 1,280,228.

Patented Oct. 1, 1918.

2 SHEETS-ISHEE 2.

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INVENTOR @y AT RNIEYII UNITED STATES PATENT OFFICE.

RICHARD F. HOYT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNDERWOOD COMPUTING MACHINE COMPANY, 0F NEW YORK, N. Y., A.

CORPORATION 0F NEW YORK.

COMBINED TYYE-WRITING AND COMPUTING MACHINE.

Specication of Letters Patent.

Application led November 2, 1914. Serial No. 869,720.

chines-and is herein described and illustra-ted as a lied to a combined'typewriting and computing machine of the Underwood- Hansonl typewherein the numeral keys of Ithe typewriter' setup aewltim on-rack bars aseries of numbers .and said numbers are litter carried into a .gang of computing ,wl 1eels. Suchmachin'es are usually provided with means whereby they may. be caused to subtract, and also withmeans whereby their computing devices may be drivenby an electric motor, said motor. driving a general operator for carrying the Vset-up numbers' into the wheels. The machine is further illustrated as one inwhich the subtraction is done by setting up numbers complementary to those normally Set iup and then driving the wheels in adding, direction.

According to my invention, the ordinary tabulating `column stops of the Underwood machine may he utilized to automatically set the mechanism for subtraction and also `automaticall start the general Operator. The setting o the mechanism for subtraction usually takes place-at the. beginning of a computation, While according-to Vmy invention, the starting of the generaloperatwor :1d- -vnntageously takes place at thel beginning of' the return movement ofV the typewriter carriage, thuslallowing ample timefor the nun1- .bers to bejcarried intoV the computing wheels without interfering with other operations.

To obtain these results, I have found it udvantageous tioprovide the usual column stops of 4the Underwood typewriting ina` chine with u dog or dogs, one of said dogs being adapted to cooperate-wither starting devicejor' .the general operatoren areturn movement of the typewriter carriage, while if'it is desiredvto do subtraction', said stop may also be provided with a dog which is tension of said 'spring effective on the forward movement 0f the typewriter carriage to set the mechanism to subtraction. One result. is that the setting of a slngle stop detern'iines the computing posit-ion of the carriage, and insures that the general operator will cause the numbers to be computed even if the carriage 4is re turned immediately' after the number is written. i

Other features and inafter appear.

In the accompanying drawings,

advantages will herebined typewriting and computing machine of the Underwood-Hanson type showing my invention as applied thereto.

Fig. v2.is a rear view of a portion of the same showing rather column stop ment.

Fig. 3 is a. diagrannnatic perspective view showing a dog on which the column stop dog is effective,l together with its coperating parts.

Fig. 4 is a fragmentary perspective view of theupper part of Fig. 2 together with some adj-.went parts.

Fig. 5 ,is a rear-view of Fig. 1.

Y Fig. 6 is a. View similar to Fig. 2, showing the typewriter carriage moving in the opposite direction. i

effective on its return move- Patented oet. 1,1918.V

Figurel is a' sectional'side view of a comdiagrammatically a but In the Underwood typewriting machine,

'universal bar 8 byh'eel's 9, so as'tooperate dogs 10 to feed the along in letter-'feeding direction. Saidcarriageis normally barrel, not shown trolfthe movement of theearriage under the barrel through Vthe eseapcment wheel l-11, on lwhicl'ifjtheyA are eective, said escapement-whel'being conto "print typewriter carriage l under tension of-a spring` v hereln, and said dogs connected to a. pinion 12 workinginfa rack bar 13, said rack bar being pvtednthe'usual manner to a carriage M on'which the platen 6 1s mounted.

A `ulatiug key 15 is depressed, project the top luv order lo rapidly position the ty )cwriter i carriage at :my desired point, tu uint-ing keys ure provided on the front ends of the key levers 16, the rear ends of the said .key levers operating plnngers 1.7, which at their upper ends, when the appropriate tab- 15 is depressed, its plunger 17 is effective to 'release the typewriter carriage from the es- 'capement dogs 10, this being done by a small uni\ ;ersal bar 2O which by means of the usual connections not material to the present invention, lifts the rack bar 13 out of the pinion 12, thus freeing the carriage froml the control of its escapement dogs 10 and permitting said` ca r lage to be drawn along until it is arrested by its' column stop, which is intercepted by'the upper eind 18 of a projected plunger 17, said upper end therefore being a counter-stop :forv the column stop 19. The column stops 19 are settable on the usual rack bar 21, which is fast on the typewriter carriage,"so that acolumn may be selected at any point inthe travel of said carriage.

, The Underwood-Hanson combined typ`ewriting and computing' machine' also in o "thfureneral operator, and the rack bars clud'es computation members .22 onv which numbers'are set up by pins 23 thereon, there .benga 'separategpinffcr each digit on each rack bar;,\an'd when the numbers are so set up, the numbers are carried into the computing Wheels 24by a general operator. To thus carry them,the 'general operator includes a crbm'ba'x; 25-.wh'ich reciprocates bacliwardly and forwardly in such a way that on its forward stroke it drives forward lthe computation members or' -rack bars 22 by strikin any .depressed pin and carrying .forwar the' various rack bars to an extent de endent'upon'the pi1`1 depressed on the individua-Luck bar.

pms are restored on the return stroke carned'fuatk by means not materialtothe 24 are not turned on said return strokebecause vof' pawl-and-ratchet connections, not

.-pinsetting linkage,

-pendzinls 26 each of which, when.\its key is depressed, descends and strikes its -roek arm 27 on a rock shaft .28, so as toA operate its o f .which there is one for eachv numeral key-.

Saidl linkages, when- -the keys are ilepressed, operate idly outside of thedding zone. -Inside the adding zone, however', the

Lamaze manner, not shown herein, connected to lift the rack bars 22, there being one rod 33 and correspondingly one jack 30 for each rack bar. The mechanism above briefly'referred .to is fully shown and described in the British Patent No. 3390 of 1912.

Since the typewriter carriage travels to the left while numbers are usually inserted beginning on the left-hand computing rack bar or computing wheel, a transposition clevice 34 fully described in said patent is pro- `vided between the rods33 and the rack bars.

22, so that as the typewriter carriage travels toward the left, it will'lift the computation bars 22 one after another, beginning with the left-hand one. In order to effect subtraction, the machine is shown as including a complementary subtraction device, 0f which the control centers 1n abar 35. When said bar is made effective, as is sometimes done, by a spring 36, it

` moves rearwardly, thus causing a cross bar 37 uniyersal .to the rock shafts-'28 to shift said rock shafts forwardly, releasing the pinsetting linkages from the additinrock arms 88 by which they are normally operated, and causing them t0 be engaged by subtraction rock bars in the manner disclosed in the application of Ogden Minton' No. 797,714, filed October 28, 1913', at the same time, their "9. pins are set on t he computation bars 22. This brief description -includes some ofthe principal operations in subtraction-setting, but said subtraction-setting i not described in detail herein inorder to \.110

simplify the disclosure.' The subtraction ,bar 35 is usually kept from beine.r made effec'- tive by a d og 39, which normally engages a slot 40 in said subtraction bar, 1

Thisdog 39 is adapted .to be move-lie in-4 effective position by the travel of tlg-.e 'typewriter' carriage. Many of the specific. conv necti-on's for doing this .are not material to the resmit invention, butthey include aro'ckmg'bail 41 which is journaled oie'- a rod 42 and comprises a rockarm 43. which is connected to a link 44, said linlf being moved upwardly at. a given. point in the travel of the typewriter carriage.

The upward motion of the link 44 withdraws a restraining bar 44* which. normally position. When "holds the subtraion pawl 39 in effective the right in F ig. l, and converts the meche subtraction pawl 39 is thus moved, the sp ging 36 pulls the bar'35 to 'tot mamas anisni to subtraction. When the general operator is started by means to be presently described, the cross bar of the same e-ngages the' lng 98 projecting downwardly rom the-bar and restores saidbar to normal position', thus setting the machine again for addition. It will be perceived from said construction that at each operation of the general operator, the computing mechanism either changes itsv state, or operates Without a 'change of statedepending on whether or not the pawl 39 has been operated, and this in turn depending. pn whether or not the link 44 has been' m'oved. The link 44 is thus moved upwardly to' cause subtraction by mea'ns of'a dog 45 forming part of a tabulating stop, saiddog, Aas best Seen Fig. 4, being illustrated as the inner extension of a dog 46, which will be de scribed later. Said dog 45 is formed as an extension of the column stop,1'9,va nd therefore whenever the column stop "set at an appropriate position on the rackgilpar 21, the dog 45 will, of course; be at thesamc po'sl tion. .This dog 45 is arrangedftofmpen ate with a pawl 47fduring the travel of the typewriter carriage in letter-feeding direction which, in Fig. 5, being arear View, is

be right. f 4.. If the .typewriter carriage is brought to the computing column bythe` tabulatng device, the pawl 47 will be struck by the dog 45 just before the column lstop over thebighest decimal counteristopof the tabula-ting device. This sets themechanism to subtraction therefore at a pixit"1u s't before the highest digit of a numbei` could be written in the computing column, The

' on whichfstroke the'carriage carries the columnfstoplt, as viewed in Fig. V4, to the left.. In vorder to prevent the pawl. 47 from 4.bein swungfout of the way during the forwar ,'motion of the carriage, there 1s'pro vided a-set screw 53 which limits the throw of pawl to the right, as viewed in Fig. 4. The restraining bar 44 islestored to its eilectivcposition' by the general' operator when actuated at the end of a subtraction operation.

. After a number has been written and set4 up -on the ncomputation pins23, the numbers have to be 'carriedinto the. computing 19 mentioned above.

19 arrivesY bail 72 Wh ich,

wheels, as described above. Tn the present mechanism, the numbers are so carried by a motor 54 which is effective on the general Yslide engaging thegeneral operator by `means of a yoke 56 fast on one of the side bars 57 of the general operator. Said motor is normally ineffective on said slide, but is made effective thereon by a dog 46 forming the other extension of the column stop extension 46 coperatcs with .a pawl 58 which is advantageously set to be operated by said dog as the typewriter carriage feeds place in the adding For this purpose, the

wise result if the typist returned the typewriter-'carriage to begin a new line immediately after writing'in said units digit place. The pawl 58 is mounted on a lever:

59 pivoted between its4 ends at` 60, and in order that the pawl may permit the typewriter carriage"to"return idly with respect thereto, said pawl is pivoted on the' lever at G1, it being'normally held in effective position by means of a spring 62, which holds it against a set screw 63. Said set screw is irovided with a jam-nut 64 so that-it may e locked in positionon its lug 651on the lever 59. This pawl is effective only on-.the return movement of' the typewritercarriage,

and on such return movement, its; cam face 66 enables the dog downwardly, thereb end 67v of said lever,

4GV to `force said lever lifting. the oppositel with the result that a link 68 is drawn upwardly to start the motor 54 and connectthe motor to the'slide.`-

The link.68 starts the motor by withdrawing the pin 70, which normally holds a clutch 69 open and also holds the mortr'circuit 7l open. The connection` between the link'68 and theV pin lIOincludes aro'cking when thelink 68 upwardly, frees the controlbar 73, which is normally held -down by a link.: 74 pivotally attached to the'1 bail 72. 'Whe'n this control bar 73 is released from the link 74, a spring 75 draws this bar upwardly, thereby depressing the OppositeV end. 76 of the control bar which is on the farther side of-its pivot;

is drawn 7 7, so that saidfcontrol bar .xrroved-admini-"Lf"l wardly the plunger 78 by ai fjplloweim. thereon, in the manner described in the' application No. 797,714'af'oresaid, This plun? general operator. The clutch is of the type shown in the application of Frederick A.

' Hart, No. 650,700, tiled September 22, 1911,

'hub 8 5 to revolve,

and patent to J. 'l`hornton, 1,146,371, July 13, 1915, wherein the circuit 71 of the motor is carried into the clutch so that the clutch not only controls` the slide 55, but also controls the circuit driving the n'iotor in the manner described in said application of Hart and in said patent.

The connections` between the motor 54 and the slide 55 include the shaft 82 of the motor, which comprises a worm 83 adapted to constantly rotate the worm gear 81 when the motor turns, said worm gear being eX- tended to form a hub 85. This hub is embraced by a cup 86 fast to the central shaft 87,I and between the hub 85 and the cup 86 are interposed balls or rolls 88, which are normally held in idle position, but which, when the pin is withdrawn,v are carried around by the roll-carrier 89, causing them to be jammed between the cup 86 and the hub 85 with the result that th'e `motor, as it turns the hub of the worm gear 84, will also turn the cup 86. Said cup drives the slide 55 by means of an abutment (not shown).

The rolls 88 are normally held in their idle position by means of the pin 70 acting through a spring 93. The pin 70 also holds in circuit-breaking position, a conductor ring 9() which is interrupted at one point so that when the .roll carrier 89 is held by a pin 70, the circuit through the conductor ring 90 is interrupted,l because the interruption in said rin 1s then opposite the conductor 91 with which said ring cooperates to form the circuit. When, however, the'pin 70 is withdrawn, the conductor ring springs for- 'ward under the impetus Yof the spring 93,

thus closing the circuit and, starting the motor. This starting of the motor causes the thereb tending to carry the roll carrier 89 aroundI by friction, there beingfprovide'd spring-pressed friction studs 92 extendiiig through the roll carrier and bearing against said hub, with the result that the studs carry around the roll carrier whenever the motor turns, unless said carrier is arrested by the pin 70.

It will be seen that I have provided a mechanism in which a sin 1e column stop of the ordinary tabulating dvice determines whether the mechanism shall add or subtract, and also insures that when the typewriter carriage is returned to write 'a new number, the number set up in the temporary register by the pins 23, will be'carried intothe computing wheels. This startingof the motor to carry in the numbers, takes lace irrespective of where the column is, an' also takes place at a time when there can be no possible interference with any other operation in the typewriting mechanism or computing mechanism.

Another advantage is that in machines ha ving' several registers (in: shown at 95, 96 and 9i, Fig. 5), only a single starting pawl 58 is needed, and thisI will be effective when ever the carriage is returned from any computing zone. The general operator will, therefore., be actuated onlyY while the typewriter carriage is returning.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having tlmsdescribed my invention, I claim: i

l. Ina combined typewriting and computing machine, the combination with a traveling carriage and computing wheels, of a source of power, and a member setta-ble on said carriage to cause said wheels to subtractfduring the forward movement of said carriage and effective during the return movement of said carriage to cause said source of power to cause said wheels to operate.

2.l In a combined typewriting and computing machinekthe combination with computing wheels, a\t'\r'a.\'eling carriage and a source of power, of\a ,member settable on said carriage adapted\to cause said source of power to operate saidtcomputing wheels during the return move ent of said carriage, and dogs forming part of said member and selectively settabl to be eifective at the beginning of the computing column on the forward movement of said carriage to cause said wheels to subtract.

In a. combined typewriting and computing machine, the combination with a general operator and a source of power actuating it, of a traveling carriage, a subtraction pawl, a p awl for contr lling said source of power. and a single devi e settable to operate one of said pawls on the forward stroke of the carriage, and the other of said pawls on the return stroke of the carriag 4. In a combined typewriting and computing machine, the combination with a traveling carriage and a tabulating -device therefor, comprising stops settable on said carriage of a dog forming part of a stop, numeral keys, computing wheels adaptedto be turned together to an extent determined by'isaid keys, a motor for so turning said wheels," and means operated hy said dog during th return travel of .the typewriter carriage for determining computing zones,'

puting iimcliine, the combination uvitlil a.v travelingcarriage and a tasitilati device therefor` comprising stops ytabl on said carriage for determining computingr zones, of a dog forming part of a stop, numeral keys, computing Wheels adapted to be turned together t@ an extent determined by said keys, a ill'iptor, a normally open circuit driving saidmotor, and means operated by said 1o dog during the return of the typewriter carriage through a computin zone for causing said motor to carry num rs into the said wheels.

6. In a' combined typewriting and computing machine, the combination witha traveling carriage and a tabulating device therefor, comprisin stops settable on said carriage, of a dog orming part of a stop, numeral keys, computing wheels adapted t'o be tulned together to an extent determined by said keys, a motor for so 'turnin said `wheels, means o erated by said dog uring the return travei) of the typewriter carriage for causing said motor to be effective on said g5 wheels, a normally open circuit driving said motor, a second dog on said stop, and a device operable by said second dog for causing said ,wheels to subtract.

7. In a combined typewriting and com- .30 puting machine, the combination with nu` ymeral keys and computing wheels, of a niotor :for carrying simultaneously the numbers written .by saidvkeys into saidwhccls,'a `traveling carriage, a tabulating device for positioning said carriage and including a column stop, dogs on oneside of said column stop adapted ,to cause said mechanism to subtract and the numbers to be automatically' carried into said wheels, and a dog on the 4o olpposite sideof said stop adapted to cause t e numbers to'be carried intfo said wheels, but inelfective to cause subtraction. 48. In a combined typewriting and computing machine, the combination with a 4p' traveling carriage and a plurality of regis- Sters for computing, of a 'general operator for said' registers, a power devicefoidriving said, general operator, a series of stopsfor positioning said carriage, Vand means assovit), l,ciated with each stop for causing said power evice to operate said general operator at i i the be 'nning of the-return offih'e carriage f 'immed ately'after writingthe last digit of a number in any one of thecomputing col-- umns.-

' 9. In a rcombined typewriting'and coni- "puting machine, the combination with a traveling carriage and aplurality of registers for computing, of a general operator i9 for said registers, a power device for driving said general operator, a series of stops for positioning'said carriage, and means associated with cach stop for-causing said power device to operate said general' operator at *l the beginning of the return of the carriage' .a normally open circuit for driving said stop, and a coperating tabulator sto'pfor immediately after writing the last digit of a. number in any one of the computing columns; said stops selectively settable to determine whether any register shall add or subtract.

l0. In a combined typewriting and computing machine, the Icombination with a traveling carriage and computing wheels', of a motor for driving said wheels iii unison,

'l5 mot'or, a tabulating stop for positioning said carriage, and means associated with -said stop and controlled thereby for closing said circuit at the beginning of the return of said carriage after writing the last digit of anumber,

11. I n a combined typewriting and computin machine, the combination with a traveling carriage and computing wheels, of a motor for driving seid'wheels in unison, a normally open circuit for driving said inotor, a tabulating stop for positioning' said carriage, and means' associated with said stop for setting said wheels for subtraction on a feeding movement of said carriage and for closing said circuit at the beginning of the return of said carriage afterV writing the last digit of a number,

- 12. "In a combined typewriting and computing machine, the combination with numeral keys, a series of groups of computing wheels, and a traveling carriage, of a gen. eral operator for all said wheels, a motor for driving said general operator, a normally open circuit, for drivin said motor, tabulating stops for positioning said cai'- riage,and means whereby said stops close said circuitl on the return of the carriage from computing in any one of said groups 'l of Wheels. 105

13. In a combined typewriting and computing machine, the combination with numeral wheels and'a travelin carriage, of a series 'of decimal' stops incu ing a units positioning said carriage, a power device for' doing the computing, and means made e'ective by said tabulator stop during its return past said units stop for causing the computation.

14.4 In a combined typewritingand computing machine, the combination with a traveling carriage and computing wheels', of a. paw] effec-.five in one direction of movement of said carriage to cause said wheels yto -substract, land `a pawl effective in the opposite direction of movement of said carringe to cause said wheels to be actuated.

15. In a combined typewritingand oompu'tingrmachin'c, the' combination with computing mechanism, of a letter-feeding carriage, a member settable thereon, indexing mechanism for indexing numbers to be carried into the .computing mechanism, and a power device for carrying into the comput'- 130 ing inecuaniaui the numbers indexed, said settahle member being reversible andl being provided with means when in either position for controllingr saidpower device'fo'r running into the f -i'nnputin'g mechanism the numbers indexed. a

16. In a. combined typewiting and cornpii'ti'iig machine. the combination with computing mechanism, ot a general operator there or, a lettei-t`eeiliiig carriage, a reversihle tabulator stop therefor. and means isis for controlling said computinliir mechanism as `to one state when said tahulator stop is'in one position, and controlling-said coinpiiting iiiechanisn'i as to another state when said tabulator stop is' reversed. said stop acting,in one position to'change ithe state through the medium of the gener l operato'r.'

17. In a combined lypewriting and coinpiiting machine. the combination with com'- puting miz-chanismE ofa. letter-feeding ear` ringe., a member Settahle thereon. and a plurality of trips for controlling' said computing mechaniem` Said settahle member havin 'lugs differentlvforined on itS opposite Si es, and adapted when in one position to present one. of said lugs to control said computing mechanism through the medium of one of saidtrips. and actin;Y when in the other position to presentthe other of said lugs to controlV said ecunputini: mechanism through ho'mediuin of hotli of said trips. $18; 4In ii. combined tipcwriting and coinpnting machine. the combination with com,

piitzirn mechanism. of indexing mechanism there or, a power device or running into theI computing' mechanism the nunihers indexed, state-controllingir mechanism ions-aid computing mechanism. and a letter-feeding carriage, said carriage act-ing to control the State of said computing nicclninisin on movement in one direction and to control the acthc other direction.

.319. In a combined tvpewriting puting-machine. the combination` with computing mechanism'. of indexing mechanism tivitv of-'said iowei device when movin" in therefor. ,a power de vice for running ,into l the. computing mechanism the numbers indexed, State-controlling mechanism for 'said computing mechanism, and a4 letter-feeding carriage. said carriage act-ing to control the.

. sta-te of said computing' mechanism' onA a letjter-feeding: movement thereof. and acting on theirturn. movement to control the act-ivitvA of said powei' device. l

Y2,0. In a Vcombined typewriting and conrpiiting machine. the combination with coniputtingr (mechanism. of indexiiigmechanism therefor, a. powerdevice for running into the computing mechanism the numbers in'- 'dexeth statclcontrolling mechanism for said eomputingmechanism, and a letter-feeding carriage for determining the computing andcom-` gi nnin letteiufeeding movement. ictilngthrough the nicdiunrof lsaid setftahle' member to control the -stextefof said compting mechanism, und

actingLron its ret-urn movement, through theinedi-nm of said settahle member-to control -the effectiveness of said'power device.

2'2. 1n -acoinbined typewritingr and computing i'naeline. the combination with computing mechanism. of a letter-feeding carriage for ileterniining the computingr zone, a tabula-tor stop for said carriage, indexing mechanism for the computing mechanism. and "a power dev-ice for running into the. computing mechanism the numbers indexed. said carriage acting at the beginning! of each computing zone. as determined hy Said tabpuriner inechanieni through the medium of Said. stop. and acting! on its return movement, also through the medium ot' said'stop. after completingir its travel through the coniputing zone.v to control 'the activity of the power device.

l2-hln a conrhined typewriliiig and computing" machine. the combination with conrputing mechanism. of a letter-fetaling` ca`rringe. a trip device controlled by the carriage for determiningr the state of aid coinputin;r mechanism, indexing devices. and e power device for -'runningr into the coinput ini: mechanism. the nuinbevaindexed. said carriage actingon -aaid trip device to control the` .state of said computing.mechanism on :i letter-feeding-niovenient of saidcai'- ringe. and acting; to-render said 'power de# vice clt'cc-tvc `on the beginning of its ret'nru nii`oveniciit. v v

1n a combined typewrit-ing and c'oniputinir nincliintngthe. combination with computing mechanisim of a letter-feeding carriage. n trip device controlled by said carriage for determining` the state of saidcom-f pulita*r mechanism. indexing devices. a power device. for runninginto the Comput-- ing niecha'nisiiii Athe niiin'heis indexed. and n. second trip device controlled by said car-y riaoe for determinine the aetivitv of said,

power device. said carriage acting on said sbate-control trip on a stepping: movement vthereof and :on said power trip on the beof its return movement.

25. n a combined typewriting and com- Ailator stop. to control the State of said coin- 9F.A

izo

puting machine, the Combination `With com,- and acting on said power trip throu h the c putng mechanism, of a. letter-feeding carmedium of said tabulator stop o'p t e beliage'for determining thc state otsaid comginning of its return movement'iil r com putmg mechanism, indexing devices, e pleting its zonal movement, 6 'power-device for runnin iinto the comput- 29. In a combined typewriting and com- 7 0 ing mechanism the num ers indexed, and puting machine, the combination with com; a second trip device controlled by said can puting mechanism, of a letter-feedin carriagefor determining the activity of said riage, a member settable thereon, in elrin` power device, said trip devices being spaced devices, a power device for running into the 10 apart a. distance corresponding to the comr'omputing mechanism the numbers indexed, 76 puting zone, said carriage acting on said a. trip device for determining the state of state-control trip at the beginning of its said computing mechanism, a second trip movementinto the4 computing zone, and device for determining the activity of acting on said power trip at the beginning said power device, said settable member of its return movement after completing its being reversible and acting when inV one 80 zonal movement.- position to act on both of said trips, and- 26. In a, combined typewriting end comwhen in the other position, acting on seid putingmachine, the combination with compower trip only; 5 puting mechanism, of a. 1ettcr-feeding car 30. In a combined typewriting and com i ringe, a member settable thereon. a trip deputing machine, the combination-"with comi-l5- vice controlled by said carriage for deterp'uting mechanism, of a letter-fe`din car-1' l mining the state of said computing mechenage, a member settable thereon,''. 1n i A nism, indexing devices, and a power device mechanism, and a. power device for r'u for running into, the computing mechanism into the computin mechans'mthke'fnumbhi'ai 25 the numbers indexed, said carriage acting indexed, said setta le member being'reiilz'l'si-.f*90'V on said '.t-ri device through the medium of ble and acting when-in one position to oonsaid Settala e member to control the state of trol the state of said computing mechanim said computing mechanism on a letterand the etiectiveness of said power-device, feeding movement of said carriage, nnkl and acting when in the other positiorrto` acting to render said pow'er device effective control the activity 4of: said power device it on the beginning of its return movement. only. t

27. In a combined typewriting and cour 31. In a combinedtynewriting and,f mpu'ting machine, the combination with computing machine, the -combination wit a puting mechanism, of a letter-'feeding certraveling carriage, and 1.e pluralit of comringe, n. member settable thereon, a tri deput-ing devices, of indexing mec anism, a 104 vice controlled by said carriage for eter power device for running into the oom utf mining the state of said computingmcchzb ing devices the numbers-indexed, members I iism, indexing devices, a power device for settable on said carriage` and a. single means i running into the computing mechanism the. common to said settable members for ooneontrollcd by said carriage for determin` at the beginning of the return ofthe caring the activity of said power device, said ringe immediately after writing the units carriage act-ing on said state-control trip digit of a number in any-one of the comthrough the medium of said settable mcmputing columns, '45 ber on a stepping movement of said can.. 32. In a combined typewritng and com-`1v10 ringe, and acting on said power trip also pitting machine', the combination with com. through the medium of .said member on its puting mechanism, of ntra. ellng carriage, return movement. an array of decimal stops for positioning 28. In a combined typewriting and comsaidcarriage, means effective at one end of...

40 numbers indexed, and a sccondtrip 'device trolling the activitv of said power dev-iceliiy puting machine. the combinationwith comthe array of decimal ,stops for'controlling 11li puting mechanism, ofa letter-feeding carthe state of said com uting mechanism, i" ringe, a tabulator stop therefor, a. trip deand means efectlve at t e other end of the l vice controlled by said carriage for deterarray of said decimal stops for controlling mining the state of said computing mecha? the activity of said computing mechanism.

5,5 nism, indexing devices, a power device for 33. In a combined typewritingnnd com- 1204 `running into the computingmechanism the puting machine, the combination with comnumbers indexed, and a scond trip device puting mechanism,` of u letter-feedmg ear- V i i controlled by said carriage for. determining riage, and means for determining on a letthe activity of said power device, said trip terfeeding movement oft `sind a-rriage,

50 devices being spaced apart e distance corF whether the carriage shall, on its return 125 'I responding to the computing zone, said move-ment, produce 'a change of state' or not carriage acting on said state-control trip in said computing mechanism, i

through the medium of said tabulatorstop 34. In a combined typewritmg and comatr the beginning'of its movement into the puting machine, the combination with c orncomputing zone, as determined by said stop, puting mechanism, of a letter-feedmg car- .130'

riage, indexing mechanism for the computing mechanism, a gener-il operator for running into the computing mechanism lthe numbers indexed, and means brought into action at a letter-feeding movement of said carriage for changing the state of the computing mechanism, said carriage on its rcturn movement causing said general loperator to restore said computing mechanism to its Vprevious state.

35. In a combined typewriting and computing machine, the combination with c0mputting mechanism, of a letter-feeding carriage, indexing mechanism for the computing mechanisma genera] operator for running into the computing mechanism the numbers indexed, and a reversible member carried by' said carriage, said member deter mining whether said general operator shall change the state or not of said computing mechanism on a return movement of said carriage, depending onthe position of said member on the stepping movement of said carria e.

36. n a combined typewriting and computing machine, the combination with computing mechanism, of a letter-feeding carriage, a reversible tabulator stop therefor, indexing mechanism for the computing mechanism, and a general operator for runnmg into the computing mechanism the numbers indexed, said tabulator stop determining by its position when stopping the carriage at the computing zone, whether said general operator shall change the state of said computing mechanism or not on the return of the carriage from its passage through the computing zone.

37. In a combined typewriting and computing machine, the combination with computing mechanism,of a letter-feeding carriage, a tabulatorstop for determining the computing zone of said carriage, and means acting through the medium' of said tabulator stop for brmging said c'omputin mecha 'nism into action o n the return o the carriage-throughv the computing zone as determined by said stop.'

38. In a combined typewriting and computing machine', the combination with computing mechanism having indexing devices, and meaiis"for-running into the computing mechanism the numbers indexed, of a lettereeding carriage, and al plurality of trips for controlling said computing mechanism, one of said trips'controlling the state of said mmputing mechanism, and the other of 'said trips' controlling the running into said com puting mechanism/of the numbers indexed, said. carriage acting on the state-controlling throughthe medium of said carriage, said carriage acting on one of said trips at the beginning of the computing zone to control the state of the computing mechanism for that zone, and acting on the other of said trips at the return movement of jsaid carriage, after it has completed its movement through the computing zone, to-run into the computing mechanism the number indexed,

40. In a combined typewriting and computing machine, the combination with computing mechanism having indexing devices, and means for running mto the 'computing mechanism the numbers indexed, of a letten feeding carriage, a. member settable thereon, and a plurality of trips for controlling said computing mechanism, said carriage acting on vone of said trips on aletter-feeding movement of Said carriage to control the state of said computing mechanism, and

return movement of said carriage tov control the 'running in o f the number indexed, said carriage acting on said trips on both said movements through the medium of said settable member.

451. In a combined typevvriting and com'- puting' machine, the combination with computing mechanism having indexing devices, and means for running into the computing mechanism the numbers indexed, ofa letterfeeding carriage, a tabulator stop therefor, and a plurality of trips for controlling said computing mechanism through the medium of sflid carriage, said carriage acting on one of said 'trips at the beginning of4 the4 computing zone as determined by said stop, to determineI the state of the computing mechanism fora-that zone, and acting on the other of said trips on the return movement of said carriage, after it has completed its movement through the computing zone, to control the running in of the numberindexed, said carriage acting on said trips `on both said' movements througl'i the medium of said tabulator stop.

f y v` RICHARDZFQHOYIT.

`Wit'nesses:` Srnmsilm, A

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